Brian I have the Rockstomper, mainly because of the price. It is OK, gets the job done. He just crimps a terminal on the end that attaches to the drum, so make sure you have at least half a dozen wraps still on the drum when you are using it (in other words, getting the extension is a great idea). Scott at Rockstomper just buys the Amsteel in bulk and then adds the ends himself, so the quality is not the same as Masterpull or X-Line. The product itself is similar enough though.

Harry Wagner
Harry Situations
4x4Wire's Toyota Section